Trestle



(No Model.) 2 Sheets-Sheet', 1.

D. E. TEAL.

TRESTLE.

No. 266,658. Patented 0615.31, 1882.

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DANIEL E. TEAL, 0F ONEIDA CASTLE, NET YORK.

TRESTLE.

SPECIFICATION forming part of Letters Patent No. 266,658, dated October31, 1882.

Application tiled April 27, 1882. (No model.)

To alt whom 'it may concern.- n

Be it known that I, DANIEL E. TEAL, of Oneida Castle, in the county ot'Oneida, in the State of New York, have invented new and usefulImprovements iu Trestles, of which the following, taken in connectionwith the aecompanying drawings, is a full, clear, and eXact description.

This invention relates to a novel construction of trestle-work designedmore particularly for supporting temporary tracks during the buildingofembankments,and for temporarily replacing damaged or broken-down orwashedout trestles.

rIhe invention consists essentiallyin a knockdown trestle-bent composedot' posts provided with straps or tie-rods adapted to be set at variousheights on the posts, and a cross-beam extended from post to post andsupported by the adjustable straps of the posts, the whole beingarranged to be readily taken apart and moved about, and as readilyunited, and when united form a substantial, yetsimpleand cheap trestle.

The invention also consists inanovel means of bracing longitudinally aseries ot' the aforesaid kuockdown trestle-bents, and in devices fordetach ably connecting therewith the trackstringer, all as hereinaftermore t'ul ly explained,

and specifically set forth in the claims.

In the accompanying drawings, Figure 1 is a side elevation ot' myinvention; Fig. 2, an end view of the same; Fig. 3, a plan view, andFig. et a detail view ofthe componentparts of a trestle-bent.

Similar letters of reference indicate corresponding parts.

A A representthe two posts ot' my improved trestle-bent, said postsbeing provided at their outer faces with a series ot' shoulders ornotches, a a, arranged at ditt'erent heights or different points in thelength ot' the post.

B is the cross-beam, extended from post to post, and used in lieu of theusual cap-piece of ordinary trestles, said cross-beam consisting of aplain stick ot' timber devoid of the usual tenons on its ends forconnection with the post. Its under side is provided with a notch or Yshoulder, a, near each end, for the reception the notches a ot' thepost', and supports by its lower end the beam B, said strap being formedof an endless band of flat bar-iron, so as to obtaina broad bearingonthe shoulders or notches a a. It embraces the sides of the post andbeam, and thus et't'ectually maintains the sides of said parts in linewith each other.

C U are two braces secured to the underside of the central portion ofthe beam B, the outer end of said braces having a plain face in linewith the end face ofthe beam. The under side of said end of the brace isprovided with a shoulder or notch, a', similar to that ot the beam, andanother strap, c, like that which supports the beam, is hung in one ofthe notches (t ot' the post and engages the notch of the brace, and thussupports the same. It will be observed that by this arrangement the twostraps c c are the sole means ot' supporting the beam B and brace U andof uniting the same with the post A, and thatsaid sustaining-straps drawthe parts together with increased force as the weight is applied to thebeams B. When a series of the described trestle-bents are employed theyare braced longitudinally by means ot straps or iiat bars fj', providedon theirends with eyes g, by which they are detachably connected tostud-bolts h h, secured to the outer side of the posts A, said boltspassing through the eye of the straps f, and being provided with a nut,i, over thestrap,to confine thesame in its position. rlhe straps arearranged diagonally from post to post, so as to properly brace thesuccessive bents.

K is a plate interposed between the ends ot' the straps fand the faceot' the post to which they are connected, said plate extending from boltto bolt, lt, and overthe notches a, in which are hung the straps c, andthereby serving both as a washer under the straps j' and as a guard toretain the strap e in thenotchaof the post when the latter-is detachedfrom the beam B and brace G. Very high trestles .I provide withadditional braces in the form ot' rods m, having their ends a bent atright angles and inserted each iu one of a series ot" holes, l, in thesides ot' the posts, as shown, said rods being disposed diagonally inthe usual manner of ordinary braces. rlhe posts A A are provided ontheir lower extremity with a dowelpin, @,which enters a hole,d, in alongitudinal sill, s, placed under the foot of the posts, as shown inFig. l of the drawings.

D D represent the trackstringers,laid upon the beam B, the two outerstringers being placed close to the posts and detachably secured intheir position by a clip or shoe, o, on the side of the respectivestringere, said clip being provided with flanges p, which engageopposite sides ofthe post, the stringers being held against the innerface of the post by means of stays min the form of metal bars, pivotedon top of the beam B, and having on its end an upturned shoulder, bywhich it bears against the inner side of the track-Stringer.

rlhe described construction and combination of partsconstitutesaknock-down trestle which is readily erected on most anyground, and when erected is as strong and durable as any wooden trcstle,and with less consumption of timber.

The cross-beams B are trussed or braced for the express purpose ofsettingtheposts of each bent a sufficient distance apart to allow thebent to stride the embankment in process of construction, and over whichsaid trcstle isdesigned to support a temporary track. The posts comingnear the foot ofthe slope of the embankment prevents their being buriedany considerable depth, and thus allows the trestle-bents to be readilymoved forward as the embankment progresses.

Heretoi'ore all temporary trestles used for the purpose aforesaid wereburied and left in the embankment, thereby not only incurring the wasteof said trestles, but also impairing the solidity ot' the embankment bythe decay of the embedded trestle.

Having described my invention,what Iclaim 1s- '1. The combination of thepostsA, provided at their outer side with notches a a at various pointsot' their height, the cross-beam B and braces C, provided respectivelyat their under side with the notch a', and the straps c c, hooked in twoofthe notches of the post and in the notch of the cross-beam and itsbrace, respectively, substantially as described and shown.

2. The combination of the sill's, provided with the holes d, the postsA, provided with dowels e and with notches or shoulders a a, thecross-beam B and braces C, provided with notches or shoulders a c, andthe removable straps c c. embracing the post and the crossbeam and itsbrace, and adapted-to engage the shoulders thereof, substantially asshown and set forth.

3. The combination ofthe posts A, provided with notches a a,the beam B,and brace G, provided respectively with the notch a', the adjustablestraps c c, engaged with said notches, the plate K, placed over thenotches of the post, the metal straps ff, provided with eyes g, and thebolts h h, connecting said plate and straps detachably on thepost,substantially as described and shown.

4. In combination with the posts A and cross-beam B, the track-stringerD, having on its side the clip or shoe 0, .with iianges p, e11- gagingopposite sides of the post, and the stay r, adjustably connected to thebeam B, substantially in the manner shown and described, for the purposeset forth.

In testimony whereofI have hereunto signed my name and affixed my seal,in the presence of two attesting witnesses,at Syracuse, in the county ofOnondaga, in the State ot' New York,

this 25th day of April, 1882.

DANIEL E. TEAL. Witnesses:

C. H. DUELL, WM. C. RAYMOND.

